I would recommend LOL’s Dominion Mode for anyone wanting to get into the MOBA genre. Start out with some coop cames against easy bots and then move directly into normal PVP.
It's faster paced, not as many esoteric details you need to know, and not nearly as much rage compared to the traditional Map. There are still a good number of Jerks, but it's usually fairly cordial. Even in random pick.
As you play you will level your character, pick up tips and tricks, and get familiar with the items, abilities, Metagame and Champions.
I tried getting into the MOBA scene several times, both with LOL and Dota 2 butt the environment was just too nasty. It wasn’t fun. Since I started playing Dominion, I'm hooked. I’ve actually had no desire to go back to the standard mode.
Also, if there is a jerk in your match it's very easy to ignore and report them. RIOT does it's best to weed out the players making it tough on the rest of us.